Dicyclopentadiene is slowly distilled through a fractionating column collecting only that material which refluxes below 44 (cyclopentadiene boils at 42.5 and dicyclopentadieneat 170 ).

• 将双环戊二烯缓慢地经分馏柱蒸馏，收集低于44的馏分。（环戊二烯的沸点为42.；5，而双环戊二烯的沸点为170）。